Chapter 2.5 Variation and inheritance Flashcards Preview

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Flashcards in Chapter 2.5 Variation and inheritance Deck (11):
1

Differences that can be seen between individual members of a species are called

Variation

2

In discrete variation the differences in a characteristic are

clear-cut and show a discontinuous pattern.

3

In continuous variation their is a

range of variation between the extremes of a characteristic

4

Discrete variation arises because

individuals carry different alleles of the discrete genes for the characteristic

5

In continuous variation, the characteristic is usually

polygenic which means that different alleles of many different genes are involved

6

The phenotype of an organism is the

outward appearance of a characteristic it has

7

The genotype of an organism is a

statement of the alleles it has for a characteristic

8

Dominant alleles always show in the

phenotype of an organism that has them

9

Recessive alleles only show themeselves

in the phenotype if an organism has inherited one from each parent

10

A homozygous organism has

two copies of the same allele of a particular gene, one from each parent

11

A heterozygous organism has

inherited two different alleles of the same gene; one from each parent.